A variation of the bar chart with negative values example using a custom axis to flip the tick orientation for the negative bars.
Created
February 18, 2016 05:36
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Bar Chart with Negative Values II
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license: gpl-3.0 |
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name | value | |
---|---|---|
A | -15 | |
B | -20 | |
C | -22 | |
D | -18 | |
E | 2 | |
F | 6 | |
G | 26 | |
H | 18 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.bar--positive { | |
fill: steelblue; | |
} | |
.bar--negative { | |
fill: brown; | |
} | |
.axis text { | |
font: 10px sans-serif; | |
} | |
.axis path, | |
.axis line { | |
fill: none; | |
stroke: #000; | |
shape-rendering: crispEdges; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script> | |
var margin = {top: 20, right: 30, bottom: 40, left: 30}, | |
width = 960 - margin.left - margin.right, | |
height = 500 - margin.top - margin.bottom; | |
var x = d3.scale.linear() | |
.range([0, width]); | |
var y = d3.scale.ordinal() | |
.rangeRoundBands([0, height], 0.1); | |
var xAxis = d3.svg.axis() | |
.scale(x) | |
.orient("bottom"); | |
var yAxis = d3.svg.axis() | |
.scale(y) | |
.orient("left") | |
.tickSize(6, 0); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width + margin.left + margin.right) | |
.attr("height", height + margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
d3.tsv("data.tsv", type, function(error, data) { | |
x.domain(d3.extent(data, function(d) { return d.value; })).nice(); | |
y.domain(data.map(function(d) { return d.name; })); | |
svg.selectAll(".bar") | |
.data(data) | |
.enter().append("rect") | |
.attr("class", function(d) { return "bar bar--" + (d.value < 0 ? "negative" : "positive"); }) | |
.attr("x", function(d) { return x(Math.min(0, d.value)); }) | |
.attr("y", function(d) { return y(d.name); }) | |
.attr("width", function(d) { return Math.abs(x(d.value) - x(0)); }) | |
.attr("height", y.rangeBand()); | |
svg.append("g") | |
.attr("class", "x axis") | |
.attr("transform", "translate(0," + height + ")") | |
.call(xAxis); | |
var tickNegative = svg.append("g") | |
.attr("class", "y axis") | |
.attr("transform", "translate(" + x(0) + ",0)") | |
.call(yAxis) | |
.selectAll(".tick") | |
.filter(function(d, i) { return data[i].value < 0; }); | |
tickNegative.select("line") | |
.attr("x2", 6); | |
tickNegative.select("text") | |
.attr("x", 9) | |
.style("text-anchor", "start"); | |
}); | |
function type(d) { | |
d.value = +d.value; | |
return d; | |
} | |
</script> |
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